Liquid ejection head
AssigneeCanon Kabushiki Kaisha
InventorMineo Shimotsusa
Life of this patent
Estimating the term…
Abstract
A liquid ejection head including a base substrate, an ejection port to eject a liquid, a heating element formed above the base substrate that heats the liquid to eject the liquid from the ejection port, a temperature detection element formed above the base substrate that detects a temperature of the liquid, a wiring layer connected to the heating element, a protective layer formed on the base substrate that protects the heating element and the wiring layer from the liquid, and a liquid supply port that penetrates the base substrate and supplies the liquid to the ejection port. When viewed in a direction perpendicular to the base substrate, the temperature detection element is disposed between the heating element and the liquid supply port, and the temperature detection element is formed on the protective layer.
Claims15
A liquid ejection head comprising:
- a base substrate;
- an ejection port configured to eject a liquid;
- a first heating element formed above the base substrate, wherein the first heating element heats the liquid to eject the liquid from the ejection port;
- a temperature detection element formed above the base substrate, wherein the temperature detection element detects a temperature of the liquid;
- a second heating element formed under the temperature detection element;
- a protective layer formed on the base substrate, wherein the protective layer protects the first heating element;
- and
- a liquid supply port configured to penetrate the base substrate, wherein the liquid supply port supplies the liquid to the first heating element,
- wherein when viewed in a direction perpendicular to the base substrate, the temperature detection element is disposed between the first heating element and the liquid supply port,
- wherein, when viewed in the direction perpendicular to the base substrate, the second heating element and the temperature detection element overlap at least partially, and
- wherein the temperature detection element is formed on the protective layer.
Dependencies are inferred from the claim text.